Companies using MetroFax and OpenAI

5 companies in our data have public evidence for both MetroFax and OpenAI, and 5 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

5companies use both

100%of MetroFax users

under 1%of OpenAI users

5name both as subprocessors

Companies using one are 7.1 times as likely as the average company in our data to show evidence of the other.

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

Company	MetroFax	OpenAI
airSlateairslate.comairSlate builds automation products for editing and signing documents, automating business processes, and acquiring new customers.Productivity and collaboration
DocHubdochub.comDocHub provides online tools to edit, sign, share, and create forms for PDF documents.Productivity and collaboration
Instapageinstapage.comInstapage provides an AI-powered platform for creating landing pages and websites, with tools for A/B testing, personalization, and email marketing.Marketing
SignNowsignnow.comairSlate SignNow provides electronic signature and document workflow tools that let users sign, send, track, and store documents from any device, along with templates, fillable fields, and an API for embedding eSignatures in other apps.Productivity and collaboration
US Legal Formsuslegalforms.comUS Legal Forms provides an online library of state-specific legal forms.Legal

The two technologies

MetroFax

Productivity

MetroFax is an online fax service that lets users send and receive faxes through email, a web browser, or a smartphone, without fax machines or dedicated phone lines. It is used for sending and receiving faxes over the internet, with each fax delivered as a file attachment that can be viewed, printed, forwarded, or saved.

Summarized from metrofax.com on 9 Nov 2026.

100% of the 5 companies we see using MetroFax also show the other.

All 5 companies using MetroFax 5 name it as a subprocessor More in Productivity

OpenAI

AI and LLM providers

OpenAI is a platform that provides an API for building with OpenAI models. It is used to access models, tools, and services for tasks such as text generation, image generation, audio, and agents.

Summarized from developers.openai.com on 8 Nov 2026.

under 1% of the 3,342 companies we see using OpenAI also show the other.

All 3,342 companies using OpenAI 2,560 name it as a subprocessor More in AI and LLM providers

Other pairs

Companies with their own evidence for both.

More with MetroFax

Akamai5companies

Amazon Web Services5companies

Cloudflare5companies

Google Cloud5companies

Google Workspace5companies

InterFax5companies

More with OpenAI

Cloudflare3,335companies

Google Workspace2,513companies

Anthropic2,027companies

Amazon Web Services1,913companies

Stripe1,681companies

Google1,578companies

Questions

How many companies use both MetroFax and OpenAI?

5 companies in StrataDB's data have public evidence for both, and 5 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use MetroFax and OpenAI?

airSlate, DocHub, Instapage, SignNow and US Legal Forms. Each one links to the evidence behind it.

How does StrataDB know a company uses MetroFax and OpenAI?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using MetroFax and OpenAI

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

Every company and vendor, with its public source
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